CVE-2026-90692: D-Link Dir-878

Critical severity, CVSS 9.9. EPSS: 0.9% chance of exploitation in the next 30 days.

A vulnerability was detected in D-Link DIR-878 120B05. This affects the function SetDynamicDNSIPv6Settings of the component Dynamic DNS IPv6 Settings. The manipulation of the argument IPv6Address/Hostname results in stack-based buffer overflow. The attack may be launched remotely.

Affected products

• D-Link Dir-878: version 120B05 only

Published 2026-09-14. Last modified 2026-09-15.